Compare phones
| Global Score | |
| 77.7 | 91.8 |
| Basic Information | |
| Samsung | Samsung |
| Android 10 | Android 11 |
| 2020-06-19 | 2021-01-29 |
| 6.44 x 2.96 x 0.35 inches | 5.97 x 2.80 x 0.31 inches |
| 6.77 ounces | 6.03 ounces |
| Black, Blue, Red and White | Gray, Phantom pink, Violet and White |
| -- | Aluminum and Plastic |
| -- | Scratch-Resistant Glass |
| -- | $ 722.00 |
| Display / Screen | |
| 6.5 inches | 6.2 inches |
| 1600 x 720 pixels | 2400 x 1080 pixels |
| TFT | Dynamic AMOLED |
| 270 pixels per inch | 424 pixels per inch |
| -- | 1300 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.2 | 9.2 |
| Performance | |
| Samsung Exynos 850 chipset | Qualcomm Snapdragon 888 chipset |
| Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 3 GB RAM | 8 GB RAM |
| Mali-G76 GPU | Adreno 660 GPU |
| 9.09 | 9.63 |
| Storage | |
| 32 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | No SD card slot |
| 9.84 | 10.1 |
| Camera | |
| 48.00 MP + 13.00 MP | 12.00 MP + 10.00 MP |
| f/2.00 aperture | f/1.80 aperture |
| 26.00mm focal length | 26.00mm focal length |
| 0.5 inches (1/2") sensor | 0.57 inches (1/1.76") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 7680 x 4320 (24 fps) video resolution |
| -- | 1280 x 720 (960 fps) (HD) slow motion video |
| 10.78 | 10.78 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM |
| 6.7 | 10.7 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 6.8 | 5.92 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
Galaxy S21 has a general score of 91.8, which is much better than Samsung Galaxy A21s's 77.7 global score. Even when the Galaxy S21 and the Samsung Galaxy A21s were released only a couple months apart, the Galaxy S21 is somewhat thinner and lighter. Both of these phones work with Android OS (operating system), but the Galaxy S21 has a newer 11 version while Samsung Galaxy A21s has Android 10.
Samsung Galaxy S21 has a little faster processor than Galaxy A21s, and although they both have a Octa-Core CPU, the Samsung Galaxy S21 also has a greater amount of RAM memory. The Samsung Galaxy S21 counts with a way better looking screen than Samsung Galaxy A21s, because although it has a quite smaller screen, it also counts with a lot better resolution of 1080 x 2400 and a lot more pixels per display inch.
The Samsung Galaxy S21 features just a bit bigger memory capacity to install applications and games or saving photos and videos than Samsung Galaxy A21s, because although it has no slot for external memory cards, it also counts with 128 GB internal storage. Samsung Galaxy A21s has longer battery performance than Galaxy S21, because it has a 5000mAh battery capacity against 4000mAh.
The Samsung Galaxy S21 counts with a camera that is very similar to the Samsung Galaxy A21s one, because although the Samsung Galaxy S21 has a camera in the back with a lot lower 12 megapixels resolution, it also counts with a bigger back camera sensor capturing better quality videos and photographs, a bigger camera aperture to capture better low light captures and video and a lot better video definition.
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